Move fde XML parser to core

This CL moves the XML parser from FDE into FXCRT and renames to CFX_
from CFDE_.

Change-Id: I21a9590bf74daf5517df630d7e7a5de89da99ea4
Reviewed-on: https://pdfium-review.googlesource.com/4312
Commit-Queue: dsinclair <dsinclair@chromium.org>
Reviewed-by: Tom Sepez <tsepez@chromium.org>
Reviewed-by: Nicolás Peña <npm@chromium.org>

1 files changed, 128 insertions, 0 deletions

diff --git a/core/fxcrt/xml/cfx_xmlsyntaxparser.h b/core/fxcrt/xml/cfx_xmlsyntaxparser.h
new file mode 100644
index 0000000000..519f2833d6
--- /dev/null
+++ b/core/fxcrt/xml/cfx_xmlsyntaxparser.h
@@ -0,0 +1,128 @@
+// Copyright 2017 PDFium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
+
+#ifndef CORE_FXCRT_XML_CFX_XMLSYNTAXPARSER_H_
+#define CORE_FXCRT_XML_CFX_XMLSYNTAXPARSER_H_
+
+#include <stack>
+#include <vector>
+
+#include "core/fxcrt/cfx_blockbuffer.h"
+#include "core/fxcrt/cfx_retain_ptr.h"
+#include "core/fxcrt/cfx_seekablestreamproxy.h"
+#include "core/fxcrt/fx_string.h"
+#include "core/fxcrt/xml/cfx_xmlnode.h"
+
+enum class FX_XmlSyntaxResult {
+  None,
+  InstructionOpen,
+  InstructionClose,
+  ElementOpen,
+  ElementBreak,
+  ElementClose,
+  TargetName,
+  TagName,
+  AttriName,
+  AttriValue,
+  Text,
+  CData,
+  TargetData,
+  Error,
+  EndOfString
+};
+
+class CFX_XMLSyntaxParser {
+ public:
+  explicit CFX_XMLSyntaxParser(
+      const CFX_RetainPtr<CFX_SeekableStreamProxy>& pStream);
+  ~CFX_XMLSyntaxParser();
+
+  FX_XmlSyntaxResult DoSyntaxParse();
+
+  int32_t GetStatus() const;
+  FX_FILESIZE GetCurrentPos() const { return m_ParsedChars + m_Start; }
+  FX_FILESIZE GetCurrentBinaryPos() const;
+  int32_t GetCurrentNodeNumber() const { return m_iCurrentNodeNum; }
+  int32_t GetLastNodeNumber() const { return m_iLastNodeNum; }
+
+  CFX_WideString GetTargetName() const {
+    return m_BlockBuffer.GetTextData(0, m_iTextDataLength);
+  }
+
+  CFX_WideString GetTagName() const {
+    return m_BlockBuffer.GetTextData(0, m_iTextDataLength);
+  }
+
+  CFX_WideString GetAttributeName() const {
+    return m_BlockBuffer.GetTextData(0, m_iTextDataLength);
+  }
+
+  CFX_WideString GetAttributeValue() const {
+    return m_BlockBuffer.GetTextData(0, m_iTextDataLength);
+  }
+
+  CFX_WideString GetTextData() const {
+    return m_BlockBuffer.GetTextData(0, m_iTextDataLength);
+  }
+
+  CFX_WideString GetTargetData() const {
+    return m_BlockBuffer.GetTextData(0, m_iTextDataLength);
+  }
+
+ protected:
+  enum class FDE_XmlSyntaxState {
+    Text,
+    Node,
+    Target,
+    Tag,
+    AttriName,
+    AttriEqualSign,
+    AttriQuotation,
+    AttriValue,
+    Entity,
+    EntityDecimal,
+    EntityHex,
+    CloseInstruction,
+    BreakElement,
+    CloseElement,
+    SkipDeclNode,
+    DeclCharData,
+    SkipComment,
+    SkipCommentOrDecl,
+    SkipCData,
+    TargetData
+  };
+
+  void ParseTextChar(wchar_t ch);
+
+  CFX_RetainPtr<CFX_SeekableStreamProxy> m_pStream;
+  FX_STRSIZE m_iXMLPlaneSize;
+  int32_t m_iCurrentPos;
+  int32_t m_iCurrentNodeNum;
+  int32_t m_iLastNodeNum;
+  int32_t m_iParsedBytes;
+  FX_FILESIZE m_ParsedChars;
+  std::vector<wchar_t> m_Buffer;
+  int32_t m_iBufferChars;
+  bool m_bEOS;
+  FX_FILESIZE m_Start;  // Start position in m_Buffer
+  FX_FILESIZE m_End;    // End position in m_Buffer
+  FX_XMLNODE m_CurNode;
+  std::stack<FX_XMLNODE> m_XMLNodeStack;
+  CFX_BlockBuffer m_BlockBuffer;
+  int32_t m_iAllocStep;
+  wchar_t* m_pCurrentBlock;  // Pointer into CFX_BlockBuffer
+  int32_t m_iIndexInBlock;
+  int32_t m_iTextDataLength;
+  FX_XmlSyntaxResult m_syntaxParserResult;
+  FDE_XmlSyntaxState m_syntaxParserState;
+  wchar_t m_wQuotationMark;
+  int32_t m_iEntityStart;
+  std::stack<wchar_t> m_SkipStack;
+  wchar_t m_SkipChar;
+};
+
+#endif  // CORE_FXCRT_XML_CFX_XMLSYNTAXPARSER_H_